Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

How much of carbon is dissolved in the oceans?

Mention any two reasons why plants depend on other organisms for their survival, even though they make their own organic food.

What are the viruses that cause cancer called?

Mention the two additional processing which hnRNA needs to undergo after splicing so as to become functional.

1. "Fortification of crops is the need of the hour." Give two reasons.
2. Select one fresh-water and one marine fish from the following:

Prawn; Catla; Mackerel; Lobster.

Cervix contains the largest and the strongest sphincter in its wall. Give reason.

Give an example of a plant, where the F, progeny of a monohybrid cross has the same genotypic and phenotypic ratios.

Mention a characteristic feature and a function of zoospores in some algae.

The egg of an animal contains 10 chromosomes, of which one is X-chromosome. How many autosomes would there be, in the karyotype of this animal?

Why are pollen grains produced in enormous quantities in maize?